The same way you write code for a 64-bit machine on an 32-bit operating system, or target any other hardware feature not present on your development box. Your box doesn't have to support the feature, it's enough to have a compiler that does.
I'm not sure if you're joking, or if you need to learn more about cross-compilation.
I'm not sure if you're joking, or if you need to learn more about cross-compilation.